5-amino-6-pyridazone derivatives, their preparation and herbicidal mixtures containing these derivatives

ABSTRACT

5-Amino-6-pyridazones of the general formulae Ia and Ib ##STR1## where R 1  is C 1  -C 4  -alkyl which may carry up to three halogen atoms, R 2  is C 1  -C 4  -alkyl or C 3  -C 6  -alkenyl, where these groups may carry up to two phenyl radicals, or C 3  -C 6  -alkynyl, A is --CO-- or --SO 2  --, B is C 1  -C 6  -alkyl, C 2  -C 6  -alkenyl or C 2  -C 6  -alkynyl, where these groups may carry up to three of the following radicals: halogen, C 1  -C 4  -alkoxy, C 1  -C 4  -alkylthio and/or phenyl; an isocyclic or heterocyclic C 3  -C 7  -cycloalkyl group or an isocyclic or heterocyclic C 3  -C 7  -cycloalkenyl group, where these groups may be fused with one or two cycloalkyl groups of this type or with one or two benzene nuclei, where the total number of ring members is from 3 to 16 and these cyclic radicals may carry up to three of the following groups: halogen, C 1  -C 4  -alkyl, C 2  -C 6  -alkenyl, C 2  - C 6  -alkynyl and/or phenyl; a mononuclear to trinuclear aromatic or heteroaromatic radical which may carry up to three of the following groups: C 1  -C 4  -alkyl, C 1  -C 4  -haloalkyl, C 1  -C 4  -alkoxy, C 1  -C 4  -haloalkoxy, C 1  -C 4  -alkylthio, C 1  -C 4  -alkylsulfinyl, C 1  -C 4  -alkylsulfonyl, cyano, nitro, carbo-C 1  -C 4  -alkoxy, N,N-di-C 1  -C 4  -alkylcarbamido and/or halogen. 
     These compounds are used as herbicidal active ingredients.

The present invention relates to 5-amino-6-pyridazones of the formula Ia and/or Ib ##STR2## where R¹ is C₁ -C₄ -alkyl which may carry up to three halogen atoms,

R² is C₁ -C₄ -alkyl or C₃ -C₆ -alkenyl, where these groups may carry up to two phenyl radicals, or C₃ -C₆ -alkynyl,

A is --CO-- or --SO₂ --,

B is C₁ -C₆ -alkyl, C₂ -C₆ -alkenyl or C₂ -C₆ -alkynyl, where these groups may carry up to three of the following radicals: halogen, C₁ -C₄ -alkoxy, C₁ -C₄ -alkylthio and/or phenyl,

an isocyclic or heterocyclic C₃ -C₇ -cycloalkyl group or an isocyclic or heterocyclic C₃ -C₇ -cycloalkenyl group, where these groups may be fused with one or two cycloalkyl groups of this type or with one or two benzene nuclei, where the total number of ring members is from 3 to 16 and these cyclic radicals may carry up to three of the following groups: halogen, C₁ -C₄ -alkyl, C₂ -C₆ -alkenyl, C₂ -C₆ -alkynyl and/or phenyl,

a mononuclear to trinuclear aromatic or heteroaromatic radical which may carry up to three of the following groups: C₁ -C₄ -alkyl, C₁ -C₄ -haloalkyl, C₁ -C₄ -alkoxy, C₁ -C₄ -haloalkoxy, C₁ -C₄ -alkylthio, C₁ -C₄ -alkylsulfinyl, C₁ -C₄ -alkylsulfonyl, cyano, nitro, carbo-C₁ -C₄ -alkoxy, N,N-di-C₁ -C₄ -alkylcarbamido and/or halogen.

The present invention furthermore relates to the preparation of these compounds and their use as herbicides.

DE-B 1 105 232 discloses that N-substituted 4-amino-6-pyridazones have a herbicidal action. Particularly for use in the proximity of crops, for example by the postemergence method, however, it is desirable to have compounds which exhibit higher selectivity at a lower application rate.

We have found that this object is achieved by the 5-amino-6-pyridazone derivatives Ia and Ib defined at the outset.

We have also found that the compounds Ia and Ib have an advantageous herbicidal action, particularly by the postemergence method, and are selective with respect to a number of crops and are accordingly useful as herbicides.

We have furthermore found a process for the preparation of the compounds Ia and Ib.

For the preparation of the novel compounds Ia, a pyridazone II is reacted with hydrazine to give a 5-amino-6-pyridazone III, which is then derivatized with a compound of the formula IV. ##STR3##

In formula II, R is C₁ -C₄ -alkyl, such as methyl, ethyl, n-propyl, isopropyl and the four isomeric butyl radicals, but in particular methyl or ethyl, and Hal is halogen, such as fluorine, chlorine, bromine or iodine, but in particular chlorine or bromine.

The reduction with hydrazine is preferably carried out in an aqueous medium, with or without the addition of an inert solvent, such as diethyl ether, ethylene glycol dimethyl ether, tetrahydrofuran, methanol, ethanol, isopropanol or dimethyl sulfoxide, at from 20° to 120° C., preferably from 60° to 100° C., continuously or batchwise, under atmospheric or superatmospheric pressure (from 1 to 10 bar).

The subsequent reaction with IV is carried out in a conventional manner (Houben-Weyl, Vol. 8, page 655 et seq. and Vol. E5, page 972 et seq.) preferably under from 0.5 to 10 bar, in particular under atmospheric pressure, continuously or batchwise, at from 0° to 100° C., preferably from 20° to 40° C., in a solvent and in the presence of a base.

In formula IV, X is halogen, e.g. chloride, bromide or iodide, or carboxylate, such as acetate or propionate, but preferably chloride or bromide. As a rule, these radicals can readily be eliminated.

Suitable bases are tertiary amines, such as triethylamine, the picolines, N,N-dimethylaniline or pyridine, or inorganic bases, such as potassium hydroxide, sodium hydroxide, potassium carbonate, sodium bicarbonate, barium hydroxide and sodium acetate. Triethylamine and pyridine are preferred.

Examples of suitable solvents are n-hexane, decalin, toluene, methylene chloride, diethyl ether, tetrahydrofuran, dioxane, dimethylformamide, methanol, ethanol and isopropanol and mixtures of these.

The required pyridazones II are obtained, for example, under the conditions described in German Laid-Open Application DOS 2,526,643, by reacting a dihalo-6-pyridazone of the general formula VI with roughly the stoichiometric amount of an alcoholate of the formula VII, where M is an alkali metal cation, in particular the sodium or potassium ion, and R is alkyl of 1 to 4 carbon atoms, in particular methyl or ethyl, in the presence of an organic solvent, preferably the corresponding alcohol, at from 0° to 100° C., preferably from 10° to 40° C. ##STR4##

The compounds of the formula Ib are obtained in a conventional manner (Houben-Weyl, Vol. E5, page 998 et seq.) by alkylation, alkenylation or alkynylation of the compounds Ia. For this purpose, the compound Ia is reacted with a reagent of the formula V, where Y is a group which can be readily eliminated, such as halogen, e.g. chloride, bromide or iodide, sulfonate, such as tosylate, mesylate or trifluoromethylsulfonate, or alkylsulfate, such as methylsulfate or ethylsulfate. ##STR5##

The reaction can be carried out in the presence or absence of a solvent, continuously or batchwise, under atmospheric or superatmospheric pressure (from 1 to 10 bar), at from 20° to 180° C., preferably from 100° to 160° C., in the presence of a strong base.

Suitable bases for this purpose are, for example, sodium hydride, potassium hydride, lithium methylate, sodium methylate, sodium ethylate, potassium tertbutylate, lithium amide, sodium amide, potassium hydroxide and potassium carbonate. Sodium hydride, sodium methylate and potassium tert-butylate are preferred.

Examples of suitable solvents are n-hexane, decalin, toluene, diethyl ether, ethylene glycol dimethyl ether, dioxane, dimethylformamide, dimethyl sulfoxide, acetone, methanol, ethanol and isopropanol. Dimethylformamide is preferred.

To enable the compounds Ia and/or Ib to be used as envisaged as herbicides, the following radicals are suitable:

Suitable alkyl groups R¹ are methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl and tert-butyl, preferably methyl or ethyl, and suitable haloalkyl groups R¹ are trifluoromethyl, difluoromethyl, fluoromethyl, trichloromethyl, dichloromethyl, chloromethyl, difluorochloromethyl, 1-fluoroethyl, 2-fluoroethyl and 2,2,2-trifluoroethyl, trifluoromethyl and difluoromethyl being preferred.

Suitable alkyl groups R² are the radicals stated under R¹, in particular n-propyl, n-butyl and isobutyl, suitable alkenyl groups R² are, for example, vinyl, allyl, 2-butenyl, 1-methyl-2-propenyl, 2-methyl-2-propenyl, 2-pentenyl, 1-methyl-2-pentenyl, 2,4-pentadienyl and 1-methyl-2,4-pentadienyl, preferably allyl, and suitable alkynyl groups R² are, for example, 2-propynyl, 1-methyl-2-propynyl, 2-methyl-2-propynyl and the isomeric pentynyl and hexynyl radicals, 2-propynyl being preferred.

Suitable alkyl groups B are the radicals stated under R¹ and n-pentyl, 2-methylbutyl, 3-methylbutyl, 2,2-dimethylpropyl, n-hexyl, 2-methylpentyl, 3-methylpentyl, 4-methylpentyl, 2,2-dimethylbutyl, 3,3-dimethylbutyl, 2,3-dimethylbutyl and 2-ethylbutyl, in particular n-pentyl, 3-methylbutyl, n-hexyl and 4-methylpentyl; suitable alkenyl groups B are vinyl and the radicals stated under R², 2-methyl-2-propenyl, 2-pentenyl and 2,4-pentadienyl are preferred;

suitable alkynyl groups B are ethynyl and the radicals stated under R², 3-butynyl, 3-pentynyl and 4-hexynyl are preferred;

suitable cycloalkyl groups B are, for example, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl and adamantyl as an example of a bridged system, cyclopentyl and cyclohexyl being preferred;

suitable cycloalkenyl groups B are, for example, cyclopropenyl, cyclobutenyl, cyclopentenyl, cyclohexenyl and cycloheptenyl, and norbornenyl as an example of a bridged system, preferably cyclopentenyl, cyclohexenyl and norbornenyl;

suitable heterocyclic aliphatic groups B are, for example, epoxyethyl, oxetanyl, tetrahydrofuranyl, tetrahydropyranyl, thietanyl, tetrahydrothienyl and tetrahydrothiopyranyl, and xanthenyl as an example of a benzofused group, preferably tetrahydrofuranyl, tetrahydropyranyl, tetrahydrothienyl, tetrahydrothiopyranyl and xanthenyl;

suitable heterocyclic alkenyl rings B include dihydrofuranyl, dihydrothienyl and dihydropyranyl, in particular dihydropyranyl and dihydrothienyl;

suitable isoaromatic radicals B are, for example, phenyl, naphthyl, anthracenyl and phenanthrenyl, in particular the phenyl and the naphthyl ring, and

suitable heteroaromatic groups B are, for example, pyrrolyl, pyrazolyl, imidazolyl, triazolyl, pyridyl, pyrimidyl, pyrazinyl, pyridazinyl, quinolyl or isoquinolyl, furanyl, thienyl, isoxazolyl, oxazolyl, oxathiazolyl, isothiazolyl, thioxalyl and thiodioxalyl, preferably pyrrolyl, pyrazolyl, imidazolyl, pyridyl, quinolyl, furanyl, thienyl, isoxazolyl, oxazolyl, isothiazoly and thioxazolyl.

Preferred substituents of B are

alkyl, such as the radicals stated under R¹, in particular methyl, ethyl or isopropyl;

alkenyl, such as vinyl or the radicals stated under R², preferably vinyl, 2-propenyl or 2-butenyl;

alkynyl, such as ethynyl and the radicals stated under R², in particular ethynyl or 2-propynyl;

haloalkyl, such as the radicals stated under R¹, preferably trifluoromethyl or difluoromethyl;

halogen, such as fluorine, chlorine, bromine or iodine, preferably fluorine or chlorine;

alkoxy, such as methoxy, ethoxy, n-propoxy, isopropoxy or the isomeric butoxy radicals, in particular methoxy or ethoxy, and

alkylthio, such as methylthio, ethylthio, n-propylthio, isopropylthio or the isomeric butylthio radicals, in particular methylthio or ethylthio.

The 5-amino-6-pyridazones Ia and/or Ib, or the herbicidal agents containing them, may be applied for instance in the form of directly sprayable solutions, powders, suspensions (including high-percentage aqueous, oily or other suspensions), dispersions, emulsions, oil dispersions, pastes, dusts, broadcasting agents, or granules by spraying, atomizing, dusting, broadcasting or watering. The forms of application depend entirely on the purpose for which the agents are being used, but they must ensure as fine a distribution of the active ingredients according to the invention as possible.

For the preparation of solutions, emulsions, pastes and oil dispersions to be sprayed direct, mineral oil fractions of medium to high boiling point, such as kerosene or diesel oil, further coal-tar oils, and oils of vegetable or animal origin, aliphatic, cyclic and aromatic hydrocarbons such as toluene, xylene, paraffin, tetrahydronaphthalene, alkylated naphthalenes and their derivatives such as methanol, ethanol, propanol, butanol, cyclohexanol, cyclohexanone, chlorobenzene, isophorone, etc., and strongly polar solvents such as dimethylformamide, dimethyl sulfoxide, N-methylpyrrolidone, water, etc. are suitable.

Aqueous formulations may be prepared from emulsion concentrates, pastes, dispersions, wettable powders or water-dispersible granules by adding water. To prepare emulsions, pastes and oil dispersions, the ingredients as such or dissolved in an oil or solvent may be homogenized in water by means of wetting or dispersing agents, adherents or emulsifiers. Concentrates which are suitable for dilution with water may be prepared from active ingredient, wetting agent, adherent, emulsifying or dispersing agent and possibly solvent or oil.

Examples of surfactants are: alkali metal, alkaline earth metal and ammonium salts of ligninsulfonic acid, naphthalenesulfonic acids, phenolsulfonic acids, alkylaryl sulfonates, alkyl sulfates, and alkyl sulfonates, alkali metal and alkaline earth metal salts of dibutylnaphthalenesulfonic acid, lauryl ether sulfate, fatty alcohol sulfates, alkali metal and alkaline earth metal salts of fatty acids, salts of sulfated hexadecanols, heptadecanols, and octadecanols, salts of sulfated fatty alcohol glycol ethers, condensation products of sulfonated naphthalene and naphthalene derivatives with formaldehyde, condensation products of naphthalene or naphthalenesulfonic acids with phenol and formaldehyde, polyoxyethylene octylphenol ethers, ethoxylated isooctylphenol, ethoxylated octylphenol and ethoxylated nonylphenol, alkylphenol polyglycol ethers, tributylphenyl polyglycol ethers, alkylaryl polyether alcohols, isotridecyl alcohol, fatty alcohol ethylene oxide condensates, ethoxylated castor oil, polyoxyethylene alkyl ethers, ethoxylated polyoxypropylene, lauryl alcohol polyglycol ether acetate, sorbitol esters, lignin sulfite waste liquors and methyl cellulose.

Powders, dusts and broadcasting agents may be prepared by mixing or grinding the active ingredients with a solid carrier.

Granules, e.g., coated, impregnated or homogeneous granules, may be prepared by bonding the active ingredients to solid carriers. Examples of solid carriers are mineral earths such as silicic acid, silica gels, silicates, talc, kaolin, attapulgus clay, limestone, lime, chalk, bole, loess, clay, dolomite, diatomaceous earth, calcium sulfate, magnesium sulfate, magnesium oxide, ground plastics, fertilizers such as ammonium sulfate, ammonium phosphate, ammonium nitrate, and ureas, and vegetable products such as grain flours, bark meal, wood meal, and nutshell meal, cellulosic powders, etc.

The formulations generally contain from 0.1 to 95, and preferably from 0.5 to 90, % by weight of active ingredient. The active ingredients are used in a purity of from 90 to 100, and preferably from 95 to 100, % (according to the NMR spectrum).

The 5-amino-6-pyridazones according to the invention may be formulated for instance as follows:

I. 90 parts by weight of compound no. 1.019 is mixed with 10 parts by weight of N-methyl-alpha-pyrrolidone. A mixture is obtained which is suitable for application in the form of very fine drops.

II. 20 parts by weight of compound no. 1.036 is dissolved in a mixture consisting of 80 parts by weight of xylene, 10 parts by weight of the adduct of 8 to 10 moles of ethylene oxide and 1 mole of oleic acid-N-monoethanolamide, 5 parts by weight of the calcium salt of dodecylbenzenesulfonic acid, and 5 parts by weight of the adduct of 40 moles of ethylene oxide and 1 mole of castor oil. By pouring the solution into 100,000 parts by weight of water and uniformly distributing it therein, an aqueous dispersion is obtained containing 0.02 wt % of the active ingredient.

III. 20 parts by weight of compound no. 1.039 is dissolved in a mixture consisting of 40 parts by weight of cyclohexanone, 30 parts by weight of isobutanol, 20 parts by weight of the adduct of 7 moles of ethylene oxide and 1 mole of isooctylphenol, and 10 parts by weight of the adduct of 40 moles of ethylene oxide and 1 mole of castor oil. By pouring the solution into 100,000 parts by weight of water and finely distributing it therein, an aqueous dispersion is obtained containing 0.02% by weight of the active ingredient.

IV. 20 parts by weight of compound no. 1.065 is dissolved in a mixture consisting of 25 parts by weight of cyclohexanone, 65 parts by weight of a mineral oil fraction having a boiling point between 210° and 280° C., and 10 parts by weight of the adduct of 40 moles of ethylene oxide and 1 mole of castor oil. By pouring the solution into 100,000 parts by weight of water and uniformly distributing it therein, an aqueous dispersion is obtained containing 0.02% by weight of the active ingredient.

V. 20 parts by weight of compound no. 1.094 is well mixed with 3 parts by weight of the sodium salt of diisobutylnaphthalene-alpha-sulfonic acid, 17 parts by weight of the sodium salt of a lignin-sulfonic acid obtained from a sulfite waste liquor, and 60 parts by weight of powdered silica gel, and triturated in a hammer mill. By uniformly distributing the mixture in 20,000 parts by weight of water, a spray liquor is obtained containing 0.1% by weight of the active ingredient.

VI. 3 parts by weight of compound no. 1.139 is intimately mixed with 97 parts by weight of particulate kaolin. A dust is obtained containing 3% by weight of the active ingredient.

VII. 30 parts by weight of compound no. 1.119 is intimately mixed with a mixture consisting of 92 parts by weight of powdered silica gel and 8 parts by weight of paraffin oil which has been sprayed onto the surface of this silica gel. A formulation of the active ingredient is obtained having good adherence.

VIII. 20 parts by weight of compound no. 2.443 is intimately mixed with 2 parts of the calcium salt of dodecylbenzenesulfonic acid, 8 parts of a fatty alcohol polyglycol ether, 2 parts of the sodium salt of a phenolurea-formaldehyde condensate and 68 parts of a paraffinic mineral oil. A stable oily dispersion is obtained.

The active ingredients may be applied pre- or postemergence. If certain crop plants tolerate the active ingredients less well, application techniques may be used in which the herbicidal agents are sprayed from suitable equipment in such a manner that the leaves of sensitive crop plants are if possible not touched, and the agents reach the soil or the unwanted plants growing beneath the crop plants (post-directed, lay-by treatment).

The application rates depend on the objective to be achieved, the time of the year, the plants to be combated and their growth stage, and are from 0.001 to 5.0, preferably 0.01 to 1.0, kg of active ingredient per hectare.

In view of the number of application methods possible, the compounds according to the invention, or agents containing them, may be used in a further large number of crops for removing unwanted plants. The following crops are given by way of example:

    ______________________________________                                         Botanical name      Common name                                                ______________________________________                                         Allium cepa         onions                                                     Ananas comosus      pineapples                                                 Arachis hypogaea    peanuts (groundnuts)                                       Asparagus officinalis                                                                              asparagus                                                  Avena sativa        oats                                                       Beta vulgaris spp. altissima                                                                       sugarbeets                                                 Beta vulgaris spp. rapa                                                                            fodder beets                                               Beta vulgaris spp. esculenta                                                                       table beets, red beets                                     Brassica napus var. napus                                                                          rapeseed                                                   Brassica napus var. napobrassica                                                                   swedes                                                     Brassica napus var. rapa                                                                           turnips                                                    Brassica rapa var. silvestris                                                  Camellia sinensis   tea plants                                                 Carthamus tinctorius                                                                               safflower                                                  Carya illinoinensis pecan trees                                                Citrus limon        lemons                                                     Citrus maxima       grapefruits                                                Citrus reticulata   mandarins                                                  Citrus sinensis     orange trees                                               Coffea arabica (Coffea canephora,                                                                  coffee plants                                              Coffea liberica)                                                               Cucumis melo        melons                                                     Cucumis sativus     cucumbers                                                  Cynodon dactylon    Bermudagrass                                               Daucus carota       carrots                                                    Elais guineensis    oil palms                                                  Fragaria vesca      strawberries                                               Glycine max         soybeans                                                   Gossypium hirsutum (Gossypium                                                                      cotton                                                     arboreum,                                                                      Gossypium herbaceum, Gossypium                                                 vitifolium)                                                                    Helianthus annuus   sunflowers                                                 Helianthus tuberosus                                                                               Jerusalem artichoke                                        Hevea brasiliensis  rubber plants                                              Hordeum vulgare     barley                                                     Humulus lupulus     hops                                                       Ipomoea batatas     sweet potatoes                                             Juglans regia       walnut trees                                               Lactuca sativa      lettuce                                                    Lens culinaris      lentils                                                    Linum usitatissimum flax                                                       Lycopersicon lycopersicum                                                                          tomatoes                                                   Malus spp.          apple trees                                                Manihot esculenta   cassava                                                    Medicago sativa     alfalfa (lucerne)                                          Mentha piperita     peppermint                                                 Musa spp.           banana plants                                              Nicotiana tabacum (N. rustica)                                                                     tobacco                                                    Olea europaea       olive trees                                                Oryza sativa        rice                                                       Panicum miliaceum   millet                                                     Phaseolus lunatus   limabeans                                                  Phaseolus mungo     mungbeans                                                  Phaseolus vulgaris  snapbeans, green beans,                                                        dry beans                                                  Pennisetum glaucum  pearl millet                                               Petroselinum crispum spp. tuberosum                                                                parsley                                                    Picea abies         Norway spruce                                              Abies alba          fir trees                                                  Pinus spp.          pine trees                                                 Pisum sativum       English peas                                               Prunus avium        cherry trees                                               Prunus domestica    plum trees                                                 Prunus dulcis       almond trees                                               Prunus persica      peach trees                                                Pyrus communis      pear trees                                                 Ribes sylvestre     redcurrants                                                Ribes uva-crispa    gooseberries                                               Ricinus communis    castor-oil plants                                          Saccharum officinarum                                                                              sugar cane                                                 Secale cereale      rye                                                        Sesamum indicum     sesame                                                     Solanum tuberosum   Irish potatoes                                             Sorghum bicolor (s. vulgare)                                                                       sorghum                                                    Sorghum dochna      sorgo                                                      Spinacia oleracea   spinach                                                    Theobroma cacao     cacao plants                                               Trifolium pratense  red clover                                                 Triticum aestivum   wheat                                                      Triticum durum      durum wheat                                                Vaccinium corymbosum                                                                               blueberries                                                Vaccinium vitis-idaea                                                                              cranberries                                                Vicia faba          tick beans                                                 Vigna sinensis (v. unguiculata)                                                                    cow peas                                                   Vitis vinifera      grapes                                                     Zea mays            Indian corn, sweet corn,                                                       maize                                                      ______________________________________                                    

To increase the spectrum of action and to achieve synergistic effects, the pyridazones of the formula Ia and/or Ib may be mixed and applied together with numerous representatives of other herbicidal or growth-regulating active ingredient groups. Examples of suitable components are diazines, 4H-3,1-benzoxazine derivatives, benzothiadiazinones, 2,6-dinitroanilines, N-phenylcarbamates, thiolcarbamates, halocarboxylic acids, triazines, amides, ureas, diphenyl ethers, triazinones, uracils, benzofuran derivatives, cyclohexane-1,3-dione derivatives, quinolinecarboxylic acids, phenyloxy- and (hetero)aryloxyphenylpropionic acids and salts, esters and amides thereof, etc.

It may also be useful to apply the novel compounds of the formula Ia and/or Ib, either alone or in combination with other herbicides, in admixture with other crop protection agents, e.g., agents for combating pests or phytopathogenic fungi or bacteria. The compounds may also be mixed with solutions of mineral salts used to remedy nutritional or trace element deficiencies. Non-phytotoxic oils and oil concentrates may also be added.

The instructions given in the following synthesis examples were used, after appropriate modification of the starting materials, to obtain further compounds of the formula Ia and/or Ib. The compounds obtained are given with their physical data in the following tables; those compounds without these data may be prepared analogously from the appropriate materials. In view of their structural similarity with the compounds which have been manufactured and investigated, they are expected to have a similar action.

SYNTHESIS EXAMPLES EXAMPLE 1 5-Acetylamino-1-methyl-6-pyridazone ##STR6##

a) At 80° C., 240.8 g (1.38 mol) of 5-chloro-4-methoxy-1-methyl-6-pyridazone was added in portions to 1930 ml of hydrazine hydrate in such a manner that the temperature remained at 80° C. without further heating. After cooling, the precipitate was filtered off, washed and dried. There was obtained 112.8 g (65.3%) of 5-amino-1-methyl-6-pyridazone of melting point 191°-192° C.

The 5-chloro-4-methoxy-1-methyl-6-pyridazone was prepared as follows in accordance with DE-OS 25 26 643:

295 g of 30% strength sodium methylate solution was added to 293 g (1.64 mol) of 4,5-dichloro-1-methyl-6-pyridazone in 690 ml of methanol in such a manner that a temperature of 30° C. was not exceeded. After cooling and stirring for 12 hours at 25° C., the precipitate which had formed was filtered off, washed and dried. There was obtained 241 g (84.3%) of 5-chloro-4-methoxy-1-methyl-6-pyridazone of melting point 189°-191° C.

b) A solution of 2.7 ml of acetyl chloride in 20 ml of dioxane was added dropwise to a solution of 4.0 g (0.032 mol) of 5-amino-1-methyl-6-pyridazone in 100 ml of pyridine. After stirring for 12 hours at 25° C., the solvent was distilled off under reduced pressure, and the residue was taken up with methylene chloride, washed with sodium bicarbonate solution and dried. After the solvent had been stripped off under reduced pressure and the residue stirred with a small amount of diisopropyl ether, there was obtained 3.1 g (58.0%) of 5-acetylamino-1-methyl-6-pyridazone (active ingredient 1.001) of melting point 152°-153° C.

EXAMPLE 2 5-(2-Bromobenzamido)-1-methyl-6-pyridazone ##STR7##

Analogously to Example 1b) 8.0 g (81.2%) 5-(2-bromobenzamido)-1-methyl-6-pyridazone (active ingredient 1.082) of m.p. 190° to 193° C. was obtained from 4.0 g (0.032 mol) of 5-amino-1-methyl-6-pyridazone in 100 ml of pyridine and 7.7 g (0.035 mol) of 2-bromobenzoyl chloride in 20 ml of dioxane.

EXAMPLE 3 5-[N-(2-Bromobenzoyl)-N-methyl]-amino-1-methyl-6-pyridazone ##STR8##

2.9 g of 30% strength sodium methylate solution was added to 4.8 g (0.0156 mol) of 5-(2-bromobenzamido)-1-methyl-6-pyridazone in 50 ml of dimethylformamide. The methanol was then removed completely under reduced pressure and the reaction mixture was stirred for 2.5 hours at 80° C. with 3 g of dimethyl sulfate. Water and 20 ml of concentrated ammonia solution were added and the product was extracted with ethyl acetate. After washing and drying, the organic phase was concentrated. Column chromatography using silica gel (eluant: cyclohexane/ethyl acetate) gave 3.8 g (75.5%) of 5-[N-(2-bromobenzoyl)-N-methyl]-amino-1-methyl-6-pyridazone (active ingredient 2.382) as a viscous oil.

¹ H-NMR (DMSO-d₆): 3.2 (s, 3H), 3.6 (s, 3H), 7.3 (m, 4H), 7.5 (m, 1H), 7.8 (d, I=5 Hz, 1H) ppm.

                                      TABLE 1                                      __________________________________________________________________________      ##STR9##                                                                                                      Phys. data                                     No.                                                                               B                   A  R.sup.1                                                                              mp (°C.) .sup.1 H-NMR                   __________________________________________________________________________                                     (ppm)                                          1.001                                                                             methyl              CO CH.sub.3                                                                             152-153                                        1.002                                                                             methyl              SO.sub.2                                                                          CH.sub.3                                             1.003                                                                             ethyl               CO CH.sub.3                                                                             115-117                                        1.004                                                                             ethyl               SO.sub.2                                                                          CH.sub.3                                             1.005                                                                             isopropyl           CO CH.sub.3                                             1.006                                                                             tert.-butyl         CO CH.sub.3                                             1.007                                                                             tert.-butylmethyl   CO CH.sub.3                                             1.008                                                                             chloromethyl        CO CH.sub.3                                             1.009                                                                             dichloromethyl      CO CH.sub.3                                             1.010                                                                             2-chloroethyl       CO CH.sub.3                                             1.011                                                                             methoxymethyl       CO CH.sub.3                                             1.012                                                                             ethenyl             CO CH.sub.3                                             1.013                                                                             1-methylethenyl     CO CH.sub.3                                             1.014                                                                             ethynyl             CO CH.sub.3                                             1.015                                                                             benzyl              CO CH.sub.3                                                                             154-156                                        1.016                                                                             cinnamyl            CO CH.sub.3                                                                             155-157                                        1.017                                                                             cyclopropyl         CO CH.sub.3                                                                             165-166                                        1.018                                                                             1-methylcyclopropyl CO CH.sub.3                                             1.019                                                                             2-methylcyclopropyl CO CH.sub.3                                                                             138-140                                        1.020                                                                             1-phenylcyclopropyl CO CH.sub.3                                             1.021                                                                             2,2-dichloro-1-methylcyclopropyl                                                                   CO CH.sub.3                                             1.022                                                                             cyclopentyl         CO CH.sub.3                                             1.023                                                                             1-phenylcyclopentyl CO CH.sub.3                                             1.024                                                                             9-fluorenyl         CO CH.sub.3                                             1.025                                                                             cyclohexyl          CO CH.sub.3                                                                             138-139                                        1.026                                                                             1-methylcyclohexyl  CO CH.sub.3                                                                             95-97                                          1.027                                                                             2-methyl-norborn-2-en-5-yl                                                                         CO CH.sub.3                                                                             104-150                                        1.028                                                                             tetrahydropyran-3-yl                                                                               CO CH.sub.3                                             1.029                                                                             tetrahydropyran-4-yl                                                                               CO CH.sub.3                                             1.030                                                                             5,6-dihydro-2-methyl-4H-pyran-3-yl                                                                 CO CH.sub.3                                                                             129-130                                        1.031                                                                             5,6-dihydro-2,6,6-trimethyl-4H-pyran-3-yl                                                          CO CH.sub.3                                             1.032                                                                             xanthen-9-yl        CO CH.sub.3                                             1.033                                                                             5,6-dihydro-3-methyl-4H-thiopyran-2-yl                                                             CO CH.sub.3                                             1.034                                                                             tetrahydrothiopyran-3-yl                                                                           CO CH.sub.3                                                                             156-157                                        1.035                                                                             tetrahydrothiopyran-4-yl                                                                           CO CH.sub.3                                             1.036                                                                             phenyl              CO CH.sub.3                                                                             111-112                                        1.037                                                                             phenyl              CO CH(CH.sub.3).sub.2                                   1.038                                                                             phenyl              CO C(CH.sub.3).sub.3                                    1.039                                                                             phenyl              SO.sub.2                                                                          CH.sub.3                                                                             161-163                                        1.040                                                                             2-methylphenyl      CO CH.sub.3                                                                             144-146                                        1.041                                                                             2-methylphenyl      SO.sub.2                                                                          CH.sub.3                                             1.042                                                                             2-methylphenyl      SO.sub.2                                                                          CH.sub.3                                             1.043                                                                             4-methylphenyl      CO CH.sub.3                                                                             151-153                                        1.044                                                                             2,4-dimethylphenyl  CO CH.sub.3                                             1.045                                                                             2,4-dimethylphenyl  SO.sub.2                                                                          CH.sub.3                                             1.046                                                                             2,6-dimethylphenyl  CO CH.sub.3                                             1.047                                                                             2,6-dimethylphenyl  SO.sub.2                                                                          CH.sub.3                                             1.048                                                                             2-trifluoromethylphenyl                                                                            CO CH.sub.3                                                                             185-187                                        1.049                                                                             2-trifluoromethylphenyl                                                                            SO.sub.2                                                                          CH.sub.3                                             1.050                                                                             2-methoxyphenyl     CO CH.sub.3                                                                             160-163                                        1.051                                                                             2-methoxyphenyl     SO.sub.2                                                                          CH.sub.3                                             1.052                                                                             2,6-dimethoxyphenyl CO CH.sub.3                                                                             160-164                                        1.053                                                                             2,6-dimethoxyphenyl SO.sub.2                                                                          CH.sub.3                                             1.054                                                                             2-trifluoromethoxyphenyl                                                                           CO CH.sub.3                                             1.055                                                                             2-methylthiophenyl  CO CH.sub.3                                             1.056                                                                             2-methylsulfinylphenyl                                                                             CO CH.sub.3                                             1.057                                                                             2-methylsulfonylphenyl                                                                             CO CH.sub. 3                                            1.058                                                                             2-fluorophenyl      CO CH.sub.3                                                                             194-200                                        1.059                                                                             2-fluorophenyl      SO.sub.2                                                                          CH.sub.3                                             1.060                                                                             2-fluorophenyl      CO CH.sub.2CF.sub.3                                     1.061                                                                             2,3-difluorophenyl  CO CH.sub.3                                             1.062                                                                             2,4-difluorophenyl  CO CH.sub.3                                                                             198-200                                        1.063                                                                             2,5-difluorophenyl  CO CH.sub.3                                             1.064                                                                             2,6-difluorophenyl  CO CH.sub.3                                                                             198-206                                        1.065                                                                             2-chlorophenyl      CO CH.sub.3                                                                             176-178                                        1.066                                                                             2-chlorophenyl      SO.sub.2                                                                          CH.sub.3                                                                             129-136                                        1.067                                                                             2-chlorophenyl      CO CH(CH.sub.3).sub.2                                                                   95-97                                          1.068                                                                             2-chlorophenyl      CO C(CH.sub.3).sub.3                                                                    84-86                                          1.069                                                                             2-chlorophenyl      CO CH.sub.2 CF.sub.3                                    1.070                                                                             3-chlorophenyl      CO CH.sub.3                                                                             151-153                                        1.071                                                                             3-chlorophenyl      SO.sub.2                                                                          CH.sub.3                                             1.072                                                                             4-chlorophenyl      CO CH.sub.3                                                                             231-232                                        1.073                                                                             4-chlorophenyl      SO.sub.2                                                                          CH.sub.3                                             1.074                                                                             2,3-dichlorophenyl  CO CH.sub.3                                             1.075                                                                             2,4-dichlorophenyl  CO CH.sub.3                                                                             153-154                                        1.076                                                                             2,5-dichlorophenyl  CO CH.sub.3                                                                             164-166                                        1.077                                                                             2,6-dichlorophenyl  CO CH.sub.3                                             1.078                                                                             2,6-dichlorophenyl  SO.sub.2                                                                          CH.sub.3                                             1.079                                                                             2,4,6-trichlorophenyl                                                                              CO CH.sub.3                                             1.080                                                                             2-chloro-6-methylphenyl                                                                            CO CH.sub.3                                             1.081                                                                             2-chloro-6-methylphenyl                                                                            SO.sub.2                                                                          CH.sub.3                                             1.082                                                                             2-bromophenyl       CO CH.sub.3                                                                             190-193                                        1.083                                                                             2-bromophenyl       SO.sub.2                                                                          CH.sub.3                                             1.084                                                                             2-cyanophenyl       CO CH.sub.3                                             1.085                                                                             2-cyanophenyl       SO.sub.2                                                                          CH.sub.3                                             1.086                                                                             2-nitrophenyl       CO CH.sub.3                                                                             178-186                                        1.087                                                                             2-nitrophenyl       SO.sub.2                                                                          CH.sub.3                                             1.088                                                                             2-carbomethoxyphenyl                                                                               CO CH.sub.3                                             1.089                                                                             2-carbomethoxyphenyl                                                                               SO.sub.2                                                                          CH.sub.3                                             1.090                                                                             2-carbethoxyphenyl  CO CH.sub.3                                             1.091                                                                             2-carbethoxyphenyl  SO.sub.2                                                                          CH.sub.3                                             1.092                                                                             2-(N,N-dimethylcarbamido)phenyl                                                                    CO CH.sub.3                                             1.093                                                                             2-pyridyl           CO CH.sub.3                                             1.094                                                                             3-pyridyl           CO CH.sub.3                                                                             136-137                                        1.095                                                                             2-fluoro-3-pyridyl  CO CH.sub.3                                                                             154-155                                        1.096                                                                             2-chloro-3-pyridyl  CO CH.sub.3                                             1.097                                                                             4-chloro-3-pyridyl  CO CH.sub.3                                             1.098                                                                             4-pyridyl           CO CH.sub.3                                             1.099                                                                             5-pyrimidyl         CO CH.sub.3                                             1.100                                                                             1-naphthyl          CO CH.sub.3                                             1.101                                                                             2-naphthyl          CO CH.sub.3                                             1.102                                                                             2-quinolinyl        CO CH.sub.3                                             1.103                                                                             3-quinolinyl        CO CH.sub.3                                             1.104                                                                             2-methyl-4-quinolinyl                                                                              CO CH.sub.3                                             1.105                                                                             3,7-dichloro-8-quinolinyl                                                                          CO CH.sub.3                                             1.106                                                                             7-chloro-3-methyl-8-quinolinyl                                                                     CO CH.sub.3                                             1.107                                                                             7-chloro-3-methyl-8-quinolinyl                                                                     CO CH.sub.3                                             1.108                                                                             2-pyrrolyl          CO CH.sub.3                                             1.109                                                                             3-pyrrolyl          CO CH.sub.3                                             1.110                                                                             3-chloro-2-pyrolyl  CO CH.sub.3                                             1.111                                                                             1-methyl-2-pyrrolyl CO CH.sub.3                                                                             137-138                                        1.112                                                                             2-furanyl           CO CH.sub.3                                             1.113                                                                             3-methyl-2-furanyl  CO CH.sub.3                                             1.114                                                                             5-bromo-2-furanyl   CO CH.sub.3                                                                             165-166                                        1.115                                                                             5-methyl-2-furanyl  CO CH.sub.3                                             1.116                                                                             3-furanyl           CO CH.sub.3                                             1.117                                                                             2,5-dimethyl-3-furanyl                                                                             CO CH.sub.3                                                                             123-125                                        1.118                                                                             2,4,5-trimethyl-3-furanyl                                                                          CO CH.sub.3                                             1.119                                                                             2-thienyl           CO CH.sub.3                                                                             162-164                                        1.120                                                                             3-chloro-2-thienyl  CO CH.sub.3                                                                             224-226                                        1.121                                                                             5-methyl-2-thienyl  CO CH.sub.3                                                                             147-149                                        1.122                                                                             3-thienyl           CO CH.sub.3                                             1.123                                                                             4-chloro-3-thienyl  CO CH.sub.3                                                                             165-167                                        1.124                                                                             1-methyl-5-pyrazolyl                                                                               CO CH.sub.3                                             1.125                                                                             4-pyrazolyl         CO CH.sub.3                                             1.126                                                                             1-methyl-4-pyrazolyl                                                                               CO CH.sub.3                                             1.127                                                                             3,5-dimethyl-4-pyrazolyl                                                                           CO CH.sub.3                                             1.128                                                                             1-methyl-2-imidazolyl                                                                              CO CH.sub.3                                             1.129                                                                             4-imidazolyl        CO CH.sub.3                                             1.130                                                                             2-methyl-4-imidazolyl                                                                              CO CH.sub.3                                             1.131                                                                             4-methyl-5-imidazolyl                                                                              CO CH.sub.3                                             1.132                                                                             5-isoxazolyl        CO CH.sub.3                                             1.133                                                                             4-isoxazolyl        CO CH.sub.3                                             1.134                                                                             3-isopropyl-5-isoxazolyl                                                                           CO CH.sub.3                                                                             104-105                                        1.135                                                                             3-methyl-4-isoxazolyl                                                                              CO CH.sub.3                                             1.136                                                                             4-isothiazolyl      CO CH.sub.3                                             1.137                                                                             1-methyl-4-carbethoxy-3-pyrazolyl                                                                  CO CH.sub.3                                                                             194-196                                        1.138                                                                             5-chloro-2-thienyl  CO CH.sub.3                                                                             158-160                                        1.139                                                                             2-thienyl           SO.sub.2                                                                          CH.sub.3                                                                             186-188                                        1.140                                                                             2,5-dichloro-3-thienyl                                                                             SO.sub.2                                                                          CH.sub.3                                                                             152-154                                        1.141                                                                             2,5-dichloro-3-thienyl                                                                             CO CH.sub.3                                                                             170-171                                        1.142                                                                             3-chloro-2-thienyl  SO.sub.2                                                                          CH.sub.3                                                                             185-187                                        1.143                                                                             2-chloro-3-thienyl  CO CH.sub.3                                                                             185-186                                        1.144                                                                             1-adamantyl         CO CH.sub.3                                                                             173                                            1.145                                                                             cyclobuyl           CO CH.sub.3                                                                             139-141                                        1.146                                                                             4-methyl-5-oxazolyl CO CH.sub.3                                             1.147                                                                             2-methyl-4-oxazolyl CO CH.sub.3                                             1.148                                                                             3-isopropyl-4-isoxazolyl                                                                           CO CH.sub.3                                             __________________________________________________________________________

                                      TABLE 2                                      __________________________________________________________________________      ##STR10##                                                                                                      Phys. data                                    No.                                                                               B            A  R.sup.1                                                                              R.sup.2 mp (°C.) .sup.1 H-NMR                  __________________________________________________________________________                                      (ppm)                                         2.001                                                                             methyl       CO CH.sub.3                                                                             CH.sub.3                                              2.002                                                                             methyl       CO CH.sub.3                                                                             CH.sub.2 CH.sub.2                                     2.003                                                                             methyl       CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.004                                                                             methyl       CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.005                                                                             methyl       CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.006                                                                             methyl       CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.007                                                                             methyl       SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.008                                                                             methyl       SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.009                                                                             methyl       SO.sub.2                                                                          CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.010                                                                             methyl       SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.011                                                                             methyl       SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CCH                                          2.012                                                                             methyl       SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 Ph                                           2.013                                                                             ethyl        CO CH.sub.3                                                                             CH.sub.3                                              2.014                                                                             ethyl        CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.015                                                                             ethyl        CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.016                                                                             ethyl        CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.017                                                                             ethyl        CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.018                                                                             ethyl        CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.019                                                                             ethyl        SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.020                                                                             ethyl        SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.021                                                                             ethyl        SO.sub.2                                                                          CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.022                                                                             ethyl        SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.023                                                                             ethyl        SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CCH                                          2.024                                                                             ethyl        SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 Ph                                           2.025                                                                             isopropyl    CO CH.sub.3                                                                             CH.sub.3                                              2.026                                                                             isopropyl    CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.027                                                                             isopropyl    CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.028                                                                             isopropyl    CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.029                                                                             isopropyl    CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.030                                                                             isopropyl    CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.031                                                                             tert.-butyl  CO CH.sub.3                                                                             CH.sub.3                                              2.032                                                                             tert.-butyl  CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.033                                                                             tert.-butyl  CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.034                                                                             tert.-butyl  CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.035                                                                             tert.-butyl  CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.036                                                                             tert.-butyl  CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.037                                                                             tert.-butylmethyl                                                                           CO CH.sub.3                                                                             CH.sub.3                                              2.038                                                                             tert.-butylmethyl                                                                           CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.039                                                                             tert.-butylmethyl                                                                           CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.040                                                                             tert.-butylmethyl                                                                           CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.041                                                                             tert.-butylmethyl                                                                           CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.042                                                                             tert.-butylmethyl                                                                           CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.043                                                                             chloromethyl CO CH.sub.3                                                                             CH.sub.3                                              2.044                                                                             chloromethyl CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.045                                                                             chloromethyl CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.046                                                                             chloromethyl CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.047                                                                             chloromethyl CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.048                                                                             chloromethyl CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.049                                                                             dichloromethyl                                                                              CO CH.sub.3                                                                             CH.sub.3                                              2.050                                                                             dichloromethyl                                                                              CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.051                                                                             dichloromethyl                                                                              CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.052                                                                             dichloromethyl                                                                              CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.053                                                                             dichloromethyl                                                                              CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.054                                                                             dichloromethyl                                                                              CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.055                                                                             2-chloroethyl                                                                               CO CH.sub.3                                                                             CH.sub.3                                              2.056                                                                             2-chloroethyl                                                                               CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.057                                                                             2-chloroethyl                                                                               CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.058                                                                             2-chloroethyl                                                                               CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.059                                                                             2-chloroethyl                                                                               CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.060                                                                             2-chloroethyl                                                                               CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.061                                                                             methoxymethyl                                                                               CO CH.sub.3                                                                             CH.sub.3                                              2.062                                                                             methoxymethyl                                                                               CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.063                                                                             methoxymethyl                                                                               CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.064                                                                             methoxymethyl                                                                               CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.065                                                                             methoxymethyl                                                                               CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.066                                                                             methoxymethyl                                                                               CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.067                                                                             ethenyl      CO CH.sub.3                                                                             CH.sub.3                                              2.068                                                                             1-methylethenyl                                                                             CO CH.sub.3                                                                             CH.sub.3                                              2.069                                                                             ethynyl      CO CH.sub.3                                                                             CH.sub.3                                              2.070                                                                             benzyl       CO CH.sub.3                                                                             CH.sub.3                                              2.071                                                                             cinnamyl     CO CH.sub.3                                                                             CH.sub.3                                              2.072                                                                             cyclopropyl  CO CH.sub.3                                                                             CH.sub.3                                              2.073                                                                             cyclopropyl  CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.074                                                                             cyclopropyl  CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.075                                                                             cyclopropyl  CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.076                                                                             cyclopropyl  CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.077                                                                             cyclopropyl  CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.078                                                                             1-methylcyclopropyl                                                                         CO CH.sub.3                                                                             CH.sub.3                                              2.079                                                                             1-methylcyclopropyl                                                                         CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.080                                                                             1-methylcyclopropyl                                                                         CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.081                                                                             1-methylcyclopropyl                                                                         CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.082                                                                             1-methylcyclopropyl                                                                         CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.083                                                                             1-methylcyclopropyl                                                                         CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.084                                                                             2-methylcyclopropyl                                                                         CO CH.sub.3                                                                             CH.sub.3                                              2.085                                                                             2-methylcyclopropyl                                                                         CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.086                                                                             2-methylcyclopropyl                                                                         CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.087                                                                             2-methylcyclopropyl                                                                         CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.088                                                                             2-methylcyclopropyl                                                                         CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.089                                                                             2-methylcyclopropyl                                                                         CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.090                                                                             1-phenylcyclopropyl                                                                         CO CH.sub.3                                                                             CH.sub.3                                              2.091                                                                             1-phenylcyclopropyl                                                                         CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.092                                                                             1-phenylcyclopropyl                                                                         CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.093                                                                             1-phenylcyclopropyl                                                                         CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.094                                                                             1-phenylcyclopropyl                                                                         CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.095                                                                             1-phenylcyclopropyl                                                                         CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.096                                                                             2,2-dichloro-1-methyl-                                                                      CO CH.sub.3                                                                             CH.sub.3                                                 cyclopropyl                                                                 2.097                                                                             2,2-dichloro-1-methyl-                                                                      CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                        cyclopropyl                                                                 2.098                                                                             2,2-dichloro-1-methyl-                                                                      CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                       cyclopropyl                                                                 2.099                                                                             2,2-dichloro-1-methyl-                                                                      CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                      cyclopropyl                                                                 2.100                                                                             2,2-dichloro-1-methyl-                                                                      CO CH.sub.3                                                                             CH.sub.2 CCH                                             cyclopropyl                                                                 2.101                                                                             2,2-dichloro-1-methyl-                                                                      CO CH.sub.3                                                                             CH.sub.2 Ph                                              cyclopropyl                                                                 2.102                                                                             cyclopentyl  CO CH.sub.3                                                                             CH.sub.3                                              2.103                                                                             cyclopentyl  CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.104                                                                             cyclopentyl  CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.105                                                                             cyclopentyl  CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.106                                                                             cyclopentyl  CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.107                                                                             cyclopentyl  CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.108                                                                             1-phenylcyclopentyl                                                                         CO CH.sub.3                                                                             CH.sub.3                                              2.109                                                                             1-phenylcyclopentyl                                                                         CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.110                                                                             1-phenylcyclopentyl                                                                         CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.111                                                                             1-phenylcyclopentyl                                                                         CO CH.sub.3                                                                             CH.sub. 2 CHCH.sub.2                                  2.112                                                                             1-phenylcyclopentyl                                                                         CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.113                                                                             1-phenylcyclopentyl                                                                         CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.114                                                                             9-fluorenyl  CO CH.sub.3                                                                             CH.sub.3                                              2.115                                                                             9-fluorenyl  CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.116                                                                             9-fluorenyl  CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.117                                                                             9-fluorenyl  CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.118                                                                             9-fluorenyl  CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.119                                                                             9-fluorenyl  CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.120                                                                             cyclohexyl   CO CH.sub.3                                                                             CH.sub.3                                              2.121                                                                             cyclohexyl   CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.122                                                                             cyclohexyl   CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.123                                                                             cyclohexyl   CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.124                                                                             cyclohexyl   CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.125                                                                             cyclohexyl   CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.126                                                                             1-methylcyclohexyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.127                                                                             1-methylcyclohexyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.128                                                                             1-methylcyclohexyl                                                                          CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.129                                                                             1-methylcyclohexyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.130                                                                             1-methylcyclohexyl                                                                          CO CH.sub.3                                                                             CH.sub.2 C CH                                         2.131                                                                             1-methylcyclohexyl                                                                          CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.132                                                                             5-norbornen-2-yl                                                                            CO CH.sub.3                                                                             CH.sub.3                                              2.133                                                                             5-norbornen-2-yl                                                                            CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.134                                                                             5-norbornen-2-yl                                                                            CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.135                                                                             5-norbornen-2-yl                                                                            CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.136                                                                             5-norbornen-2-yl                                                                            CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.137                                                                             5-norbornen-2-yl                                                                            CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.138                                                                             tetrahydropyran-3-yl                                                                        CO CH.sub.3                                                                             CH.sub.3                                              2.139                                                                             tetrahydropyran-3-yl                                                                        CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.140                                                                             tetrahydropyran-3-yl                                                                        CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.141                                                                             tetrahydropyran-3-yl                                                                        CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.142                                                                             tetrahydropyran-3-yl                                                                        CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.143                                                                             tetrahydropyran-3-yl                                                                        CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.144                                                                             tetrahydropyran-4-yl                                                                        CO CH.sub.3                                                                             CH.sub.3                                              2.145                                                                             tetrahydropyran-4-yl                                                                        CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.146                                                                             tetrahydropyran-4-yl                                                                        CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.147                                                                             tetrahydropyran-4-yl                                                                        CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.148                                                                             tetrahydropyran-4-yl                                                                        CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.149                                                                             tetrahydropyran-4-yl                                                                        CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.150                                                                             5,6-dihydro-2-methyl-                                                                       CO CH.sub. 3                                                                            CH.sub.3                                                 4H-pyran-3-yl                                                               2.151                                                                             5,6-dihydro-2-methyl-                                                                       CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                        4H-pyran-3-yl                                                               2.152                                                                             5,6-dihydro-2-methyl-                                                                       CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                       4H-pyran-3-yl                                                               2.153                                                                             5,6-dihydro-2-methyl-                                                                       CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                      4H-pyran-3-yl                                                               2.154                                                                             5,6-dihydro-2-methyl-                                                                       CO CH.sub.3                                                                             CH.sub.2 CCH                                             4H-pyran-3-yl                                                               2.155                                                                             5,6-dihydro-2-methyl-                                                                       CO CH.sub.3                                                                             CH.sub.2 Ph                                              4H-pyran-3-yl                                                               2.156                                                                             5,6-dihydro-2,6,6-                                                                          CO CH.sub.3                                                                             CH.sub.3                                                 trimethyl-4H-pyran-3-yl                                                     2.157                                                                             5,6-dihydro-2,6,6-                                                                          CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                        trimethyl-4H-pyran-3-yl                                                     2.158                                                                             5,6-dihydro-2,6,6-                                                                          CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                       trimethyl-4H-pyran-3-yl                                                     2.159                                                                             5,6-dihydro-2,6,6-                                                                          CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                      trimethyl-4H-pyran-3-yl                                                     2.160                                                                             5,6-dihydro-2,6,6-                                                                          CO CH.sub.3                                                                             CH.sub.2 CCH                                             trimethyl-4H-pyran-3-yl                                                     2.161                                                                             5,6-dihydro-2,6,6-                                                                          CO CH.sub.3                                                                             CH.sub.2 Ph                                              trimethyl-4H-pyran-3-yl                                                     2.162                                                                             xanthen-9-yl CO CH.sub.3                                                                             CH.sub.3                                              2.163                                                                             xanthen-9-yl CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.164                                                                             xanthen-9-yl CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.165                                                                             xanthen-9-yl CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.166                                                                             xanthen-9-yl CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.167                                                                             xanthen-9-yl CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.168                                                                             5,6-dihydro-3-methyl-                                                                       CO CH.sub.3                                                                             CH.sub.3                                                 4H-thiopyran-2-yl                                                           2.169                                                                             5,6-dihydro-3-methyl-                                                                       CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                        4H-thiopyran-2-yl                                                           2.170                                                                             5,6-dihydro-3-methyl-                                                                       CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                       4H-thiopyran-2-yl                                                           2.171                                                                             5,6-dihydro-3-methyl-                                                                       CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                      4H-thiopyran-2-yl                                                           2.172                                                                             5,6-dihydro-3-methyl-                                                                       CO CH.sub.3                                                                             CH.sub.2 CCH                                             4H-thiopyran-2-yl                                                           2.173                                                                             5,6-dihydro-3-methyl-                                                                       CO CH.sub.3                                                                             CH.sub.2 Ph                                              4H-thiopyran-2-yl                                                           2.174                                                                             tetrahydrothiopyran-                                                                        CO CH.sub.3                                                                             CH.sub.3                                                 3-yl                                                                        2.175                                                                             tetrahydrothiopyran-                                                                        CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                        3-yl                                                                        2.176                                                                             tetrahydrothiopyran-                                                                        CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                       3-yl                                                                        2.177                                                                             tetrahydrothiopyran-                                                                        CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                      3-yl                                                                        2.178                                                                             tetrahydrothiopyran-                                                                        CO CH.sub.3                                                                             CH.sub.2 CCH                                             3-yl                                                                        2.179                                                                             tetrahydrothiopyran-                                                                        CO CH.sub.3                                                                             CH.sub.2 Ph                                              3-yl                                                                        2.180                                                                             tetrahydrothiopyran-                                                                        CO CH.sub.3                                                                             CH.sub.3                                                 4-yl                                                                        2.181                                                                             tetrahydrothiopyran-                                                                        CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                        4-yl                                                                        2.182                                                                             tetrahydrothiopyran-                                                                        CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                       4-yl                                                                        2.183                                                                             tetrahydrothiopyran-                                                                        CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                      4-yl                                                                        2.184                                                                             tetrahydrothiopyran-                                                                        CO CH.sub.3                                                                             CH.sub.2 C CH                                            4-yl                                                                        2.185                                                                             tetrahydrothiopyran-                                                                        CO CH.sub.3                                                                             CH.sub.2 Ph                                              4-yl                                                                        2.186                                                                             phenyl       CO CH.sub.3                                                                             CH.sub.3                                              2.187                                                                             phenyl       CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.188                                                                             phenyl       CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.189                                                                             phenyl       CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.190                                                                             phenyl       CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.191                                                                             phenyl       CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.192                                                                             phenyl       CO CH(CH.sub.3).sub.2                                                                   CH.sub.3                                              2.193                                                                             phenyl       CO C(CH.sub.3).sub.3                                                                    CH.sub.3                                              2.194                                                                             phenyl       SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.195                                                                             phenyl       SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.196                                                                             phenyl       SO.sub.2                                                                          CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.197                                                                             phenyl       SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.198                                                                             phenyl       SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CCH                                          2.199                                                                             phenyl       SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 Ph                                           2.200                                                                             2-methylphenyl                                                                              CO CH.sub.3                                                                             CH.sub.3                                              2.201                                                                             2-methylphenyl                                                                              CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.202                                                                             2-methylphenyl                                                                              CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.203                                                                             2-methylphenyl                                                                              CO CH.sub.3                                                                             CH.sub.2 CH CH.sub.2                                  2.204                                                                             2-methylphenyl                                                                              CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.205                                                                             2-methylphenyl                                                                              CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.206                                                                             2-methylphenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.207                                                                             2-methylphenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.208                                                                             2-methylphenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.209                                                                             2-methylphenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.210                                                                             2-methylphenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CCH                                          2.211                                                                             2-methylphenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 Ph                                           2.212                                                                             3-methylphenyl                                                                              CO CH.sub.3                                                                             CH.sub.3                                              2.213                                                                             4-methylphenyl                                                                              CO CH.sub.3                                                                             CH.sub.3                                              2.214                                                                             2,4-dimethylphenyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.215                                                                             2,4-dimethylphenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.216                                                                             2,4-dimethylphenyl                                                                          CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.217                                                                             2,4-dimethylphenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.218                                                                             2,4-dimethylphenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.219                                                                             2,4-dimethylphenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.220                                                                             2,4-dimethylphenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.221                                                                             2,4-dimethylphenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.222                                                                             2,4-dimethylphenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.223                                                                             2,4-dimethylphenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.224                                                                             2,4-dimethylphenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CCH                                          2.225                                                                             2,4-dimethylphenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 Ph                                           2.226                                                                             2,6-dimethylphenyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.227                                                                             2,6-dimethylphenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.228                                                                             2,6-dimethylphenyl                                                                          CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.229                                                                             2,6-dimethylphenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.230                                                                             2,6-dimethylphenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.231                                                                             2,6-dimethylphenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.232                                                                             2,6-dimethylphenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.233                                                                             2,6-dimethylphenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.234                                                                             2,6-dimethylphenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.235                                                                             2,6-dimethylphenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.236                                                                             2,6-dimethylphenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CCH                                          2.237                                                                             2,6-dimethylphenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 Ph                                           2.238                                                                             2-trifluoromethylphenyl                                                                     CO CH.sub.3                                                                             CH.sub.3                                              2.239                                                                             2-trifluoromethylphenyl                                                                     CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.240                                                                             2-trifluoromethylphenyl                                                                     CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.241                                                                             2-trifluoromethylphenyl                                                                     CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.242                                                                             2-trifluoromethylphenyl                                                                     CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.243                                                                             2-trifluoromethylphenyl                                                                     CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.244                                                                             2-trifluoromethylphenyl                                                                     SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.245                                                                             2-methoxyphenyl                                                                             CO CH.sub.3                                                                             CH.sub.3                                              2.246                                                                             2-methoxyphenyl                                                                             CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.247                                                                             2-methoxyphenyl                                                                             CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.248                                                                             2-methoxyphenyl                                                                             CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.249                                                                             2-methoxyphenyl                                                                             CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.250                                                                             2-methoxyphenyl                                                                             CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.251                                                                             2-methoxyphenyl                                                                             SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.252                                                                             2,6-dimethoxyphenyl                                                                         CO CH.sub.3                                                                             CH.sub.3                                              2.253                                                                             2,6-dimethoxyphenyl                                                                         CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.254                                                                             2,6-dimethoxyphenyl                                                                         CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.255                                                                             2,6-dimethoxyphenyl                                                                         CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.256                                                                             2,6-dimethoxyphenyl                                                                         CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.257                                                                             2,6-dimethoxyphenyl                                                                         CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.258                                                                             2,6-dimethoxyphenyl                                                                         SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.259                                                                             2-trifluoromethoxyphenyl                                                                    CO CH.sub.3                                                                             CH.sub.3                                              2.260                                                                             2-trifluoromethoxyphenyl                                                                    CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.261                                                                             2-trifluoromethoxyphenyl                                                                    CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.262                                                                             2-trifluoromethoxyphenyl                                                                    CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.263                                                                             2-trifluoromethoxyphenyl                                                                    CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.264                                                                             2-trifluoromethoxyphenyl                                                                    CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.265                                                                             2-methylthiophenyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.266                                                                             2-methylsulfinylphenyl                                                                      CO CH.sub.3                                                                             CH.sub.3                                              2.267                                                                             2-methylsulfonylphenyl                                                                      CO CH.sub.3                                                                             CH.sub.3                                              2.268                                                                             2-fluorophenyl                                                                              CO CH.sub.3                                                                             CH.sub.3                                              2.269                                                                             2-fluorophenyl                                                                              CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.270                                                                             2-fluorophenyl                                                                              CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.271                                                                             2-fluorophenyl                                                                              CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                                                     75-77                                        2.272                                                                             2-fluorophenyl                                                                              CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.273                                                                             2-fluorophenyl                                                                              CO CH.sub.3                                                                             CH.sub.2 Ph                                                                             98-100                                       2.274                                                                             2-fluorophenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.275                                                                             2-fluorophenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.276                                                                             2-fluorophenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.277                                                                             2-fluorophenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.278                                                                             2-fluorophenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CCH                                          2.279                                                                             2-fluorophenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 Ph                                           2.280                                                                             2-fluorophenyl                                                                              CO CH.sub.2 CF.sub.3                                                                    CH.sub.3                                              2.281                                                                             2-fluorophenyl                                                                              CO CH.sub.2 CF.sub.3                                                                    CH.sub.2 CH.sub.3                                     2.282                                                                             2-fluorophenyl                                                                              CO CH.sub.2 CF.sub.3                                                                    CH(CH.sub.3).sub.2                                    2.283                                                                             2-fluorophenyl                                                                              CO CH.sub.2 CF.sub.3                                                                    CH.sub.2 CHCH.sub.2                                   2.284                                                                             2-fluorophenyl                                                                              CO CH.sub.2 CF.sub.3                                                                    CH.sub.2 CCH                                          2.285                                                                             2-fluorophenyl                                                                              CO CH.sub.2 CF.sub.3                                                                    CH.sub.2 Ph                                           2.286                                                                             2,3-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.287                                                                             2,3-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.288                                                                             2,3-difluorophenyl                                                                          CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.289                                                                             2,3-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.290                                                                             2,3-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.291                                                                             2,3-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.292                                                                             2,4-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.293                                                                             2,4-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.294                                                                             2,4-difluorophenyl                                                                          CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.295                                                                             2,4-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.296                                                                             2,4-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.297                                                                             2,4-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.298                                                                             2,5-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.299                                                                             2,5-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.300                                                                             2,5-difluorophenyl                                                                          CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.301                                                                             2,5-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.302                                                                             2,5-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.303                                                                             2,5-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.304                                                                             2,6-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.305                                                                             2,6-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.306                                                                             2,6-difluorophenyl                                                                          CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.307                                                                             2,6-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.308                                                                             2,6-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.309                                                                             2,6-difluorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.310                                                                             2-chlorophenyl                                                                              CO CH.sub.3                                                                             CH.sub.3                                              2.311                                                                             2-chlorophenyl                                                                              CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.312                                                                             2-chlorophenyl                                                                              CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.313                                                                             2-chlorophenyl                                                                              CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.314                                                                             2-chlorophenyl                                                                              CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.315                                                                             2-chlorophenyl                                                                              CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.316                                                                             2-chlorophenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.317                                                                             2-chlorophenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.318                                                                             2-chlorophenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.319                                                                             2-chlorophenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.320                                                                             2-chlorophenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CCH                                          2.321                                                                             2-chlorophenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 Ph                                           2.322                                                                             2-chlorophenyl                                                                              CO CH(CH.sub.3).sub.2                                                                   CH.sub.3                                              2.323                                                                             2-chlorophenyl                                                                              CO C(CH.sub.3).sub.3                                                                    CH.sub.3                                              2.324                                                                             2-chlorophenyl                                                                              CO CH.sub.2 CF.sub.3                                                                    CH.sub.3                                              2.325                                                                             2-chlorophenyl                                                                              CO CH.sub.2 CF.sub.3                                                                    CH.sub.2 CH.sub.3                                     2.326                                                                             2-chlorophenyl                                                                              CO CH.sub.2 CF.sub.3                                                                    CH(CH.sub.3).sub.2                                    2.327                                                                             2-chlorophenyl                                                                              CO CH.sub.2 CF.sub.3                                                                    CH.sub.2 CHCH.sub.2                                   2.328                                                                             2-chlorophenyl                                                                              CO CH.sub.2 CF.sub.3                                                                    CH.sub.2 CCH                                          2.329                                                                             2-chlorophenyl                                                                              CO CH.sub.2 CF.sub.3                                                                    CH.sub.2 Ph                                           2.330                                                                             3-chlorophenyl                                                                              CO CH.sub.3                                                                             CH.sub.3                                              2.331                                                                             3-chlorophenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.332                                                                             4-chlorophenyl                                                                              CO CH.sub.3                                                                             CH.sub.3                                              2.333                                                                             4-chlorophenyl                                                                              SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.334                                                                             2,3-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.335                                                                             2,3-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.336                                                                             2,3-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.337                                                                             2,3-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.338                                                                             2,3-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 C CH                                         2.339                                                                             2,3-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.340                                                                             2,4-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.341                                                                             2,4-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.342                                                                             2,4-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.343                                                                             2,4-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.344                                                                             2,4-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.345                                                                             2,4-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.346                                                                             2,5-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.347                                                                             2,5-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.348                                                                             2,5-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.349                                                                             2,5-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.350                                                                             2,5-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.351                                                                             2,5-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.352                                                                             2,6-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.353                                                                             2,6-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.354                                                                             2,6-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.355                                                                             2,6-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.356                                                                             2,6-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.357                                                                             2,6-dichlorophenyl                                                                          CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.358                                                                             2,6-dichlorophenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.359                                                                             2,6-dichlorophenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.360                                                                             2,6-dichlorophenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.361                                                                             2,6-dichlorophenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.362                                                                             2,6-dichlorophenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CCH                                          2.363                                                                             2,6-dichlorophenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 Ph                                           2.364                                                                             2,4,6-trichlorophenyl                                                                       CO CH.sub.3                                                                             CH.sub.3                                              2.365                                                                             2,4,6-trichlorophenyl                                                                       CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.366                                                                             2,4,6-trichlorophenyl                                                                       CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.367                                                                             2,4,6-trichlorophenyl                                                                       CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.368                                                                             2,4,6-trichlorophenyl                                                                       CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.369                                                                             2,4,6-trichlorophenyl                                                                       CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.370                                                                             2-chloro-6-methylphenyl                                                                     CO CH.sub.3                                                                             CH.sub.3                                              2.371                                                                             2-chloro-6-methylphenyl                                                                     CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.372                                                                             2-chloro-6-methylphenyl                                                                     CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.373                                                                             2-chloro-6-methylphenyl                                                                     CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.374                                                                             2-chloro-6-methylphenyl                                                                     CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.375                                                                             2-chloro-6-methylphenyl                                                                     CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.376                                                                             2-chloro-6-methylphenyl                                                                     SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.377                                                                             2-chloro-6-methylphenyl                                                                     SO.sub.2                                                                          CH.sub. 3                                                                            CH.sub.2 CH.sub.3                                     2.378                                                                             2-chloro-6-methylphenyl                                                                     SO.sub.2                                                                          CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.379                                                                             2-chloro-6-methylphenyl                                                                     SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.380                                                                             2-chloro-6-methylphenyl                                                                     SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CCH                                          2.381                                                                             2-chloro-6-methylphenyl                                                                     SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 Ph                                           2.382                                                                             2-bromophenyl                                                                               CO CH.sub.3                                                                             CH.sub.3                                                                               3.23(s)3H;3.63(s)3H;                                                           7.32(m)4H;7.58(m)1H;                                                           7,82(d)1H;J=5Hz                               2.383                                                                             2-bromophenyl                                                                               CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.384                                                                             2-bromophenyl                                                                               CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.385                                                                             2-bromophenyl                                                                               CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.386                                                                             2-bromophenyl                                                                               CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.387                                                                             2-bromophenyl                                                                               CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.388                                                                             2-cyanophenyl                                                                               CO CH.sub.3                                                                             CH.sub.3                                              2.389                                                                             2-cyanophenyl                                                                               CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.390                                                                             2-cyanophenyl                                                                               CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.391                                                                             2-cyanophenyl                                                                               CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.392                                                                             2-cyanophenyl                                                                               CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.393                                                                             2-cyanophenyl                                                                               CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.394                                                                             2-cyanophenyl                                                                               SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.395                                                                             2-nitrophenyl                                                                               CO CH.sub.3                                                                             CH.sub.3                                              2.396                                                                             2-nitrophenyl                                                                               CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.397                                                                             2-nitrophenyl                                                                               SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.398                                                                             2-nitrophenyl                                                                               CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.399                                                                             2-nitrophenyl                                                                               CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.400                                                                             2-nitrophenyl                                                                               CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.401                                                                             2-nitrophenyl                                                                               CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.402                                                                             2-nitrophenyl                                                                               SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.403                                                                             2-carbomethoxyphenyl                                                                        CO CH.sub.3                                                                             CH.sub.3                                              2.404                                                                             2-carbomethoxyphenyl                                                                        CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.405                                                                             2-carbomethoxyphenyl                                                                        CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.406                                                                             2-carbomethoxyphenyl                                                                        CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.407                                                                             2-carbomethoxyphenyl                                                                        CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.408                                                                             2-carbomethoxyphenyl                                                                        CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.409                                                                             2-carbomethoxyphenyl                                                                        SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.410                                                                             2-carbethoxyphenyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.411                                                                             2-carbethoxyphenyl                                                                          SO.sub.2                                                                          CH.sub.3                                                                             CH.sub.3                                              2.412                                                                             2-(N,N-dimethylcarb-                                                                        CO CH.sub.3                                                                             CH.sub.3                                                 amido)phenyl                                                                2.413                                                                             2-pyridyl    CO CH.sub.3                                                                             CH.sub.3                                              2.414                                                                             3-pyridyl    CO CH.sub.3                                                                             CH.sub.3                                              2.415                                                                             2-fluoro-3-pyridyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.416                                                                             2-chloro-3-pyridyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.417                                                                             4-chloro-3-pyridyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.418                                                                             4-pyridyl    CO CH.sub.3                                                                             CH.sub.3                                              2.419                                                                             5-pyrimidyl  CO CH.sub.3                                                                             CH.sub.3                                              2.420                                                                             1-naphthyl   CO CH.sub.3                                                                             CH.sub.3                                              2.421                                                                             2-naphthyl   CO CH.sub.3                                                                             CH.sub.3                                              2.422                                                                             2-quinolinyl CO CH.sub.3                                                                             CH.sub.3                                              2.423                                                                             3-quinolinyl CO CH.sub.3                                                                             CH.sub.3                                              2.424                                                                             2-methyl-4-quinolinyl-                                                                      CO CH.sub.3                                                                             CH.sub.3                                              2.425                                                                             3,7-dichloro-8-quino-                                                                       CO CH.sub.3                                                                             CH.sub.3                                                 linyl                                                                       2.426                                                                             1-methyl-2-pyrrolyl                                                                         CO CH.sub.3                                                                             CH.sub.3                                              2.427                                                                             2-furanyl    CO CH.sub.3                                                                             CH.sub.3                                              2.428                                                                             3-methyl-2-furanyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.429                                                                             5-bromo-2-furanyl                                                                           CO CH.sub.3                                                                             CH.sub.3                                              2.430                                                                             5-methyl-2-furanyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.431                                                                             3-furanyl    CO CH.sub.3                                                                             CH.sub.3                                              2.432                                                                             2,5-dimethyl-3-furanyl                                                                      CO CH.sub.3                                                                             CH.sub.3                                              2.433                                                                             2,4,5-trimethyl-3-                                                                          CO CH.sub.3                                                                             CH.sub.3                                                 furanyl                                                                     2.434                                                                             2-thienyl    CO CH.sub.3                                                                             CH.sub.3                                              2.435                                                                             2-thienyl    CO CH.sub.3                                                                             CH.sub.2 CH.sub.3                                     2.436                                                                             2-thienyl    CO CH.sub.3                                                                             CH(CH.sub.3).sub.2                                    2.437                                                                             2-thienyl    CO CH.sub.3                                                                             CH.sub.2 CHCH.sub.2                                   2.438                                                                             2-thienyl    CO CH.sub.3                                                                             CH.sub.2 CCH                                          2.439                                                                             2-thienyl    CO CH.sub.3                                                                             CH.sub.2 Ph                                           2.440                                                                             3-chloro-2-thienyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                                                               3.24(s)3H;3.60(s)                                                              3H;7.32;7.56;7.64;                                                             7.87;each(d) 1H; I=4Hz                        2.441                                                                             5-methyl-2-thienyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                              2.442                                                                             3-thienyl    CO CH.sub.3                                                                             CH.sub.3                                              2.443                                                                             4-chloro-3-thienyl                                                                          CO CH.sub.3                                                                             CH.sub.3                                                                               168-171                                       2.444                                                                             1-methyl-5-pyrazolyl                                                                        CO CH.sub.3                                                                             CH.sub.3                                              2.445                                                                             1-methyl-4-pyrazolyl                                                                        CO CH.sub.3                                                                             CH.sub.3                                              2.446                                                                             1-methyl-2-imidazolyl                                                                       CO CH.sub.3                                                                             CH.sub.3                                              2.447                                                                             5-isoxazolyl CO CH.sub.3                                                                             CH.sub.3                                              2.448                                                                             4-isoxazolyl CO CH.sub.3                                                                             CH.sub.3                                              2.449                                                                             3-isopropyl-5-isoxa-                                                                        CO CH.sub.3                                                                             CH.sub.3                                                 zolyl                                                                       2.450                                                                             3-methyl-4-isoxazolyl                                                                       CO CH.sub.3                                                                             CH.sub.3                                              2.451                                                                             4-isothiazolyl                                                                              CO CH.sub.3                                                                             CH.sub.3                                              __________________________________________________________________________

USE EXAMPLES

The action of the 5-amino-6-pyridazone derivatives I on the growth of test plants is illustrated in the following greenhouse experiments.

The vessels employed were plastic flowerpots having a volume of 300 cm³ and filled with a sandy loam containing about 3.0% humus. The seeds of the test plants were sown separately, according to species.

For postemergence treatment, either plants which had been sown in the pots and grown there were selected, or they were cultivated separately as seedlings and transplanted to the pots a few days before being treated. The plants were grown, depending on growth form, to a height of 3 to 15 cm before being treated with the active ingredients, which were suspended or emulsified in water as vehicle, and sprayed through finely distributing nozzles. The application rate for postemergence treatment was 0.25 kg/ha.

The pots were set up in the greenhouse, species from warmer climates in warmer areas (20° to 35° C.) and species from moderate climates at 10° to 20° C. The experiments were run for from 2 to 4 weeks. During this time the plants were tended and their reactions to the various treatments assessed. The assessment scale was 0 to 100, 100 denoting nonemergence or complete destruction of at least the visible plant parts, and 0 denoting no damage or normal growth.

The plants used in the greenhouse experiments were Chenopodium album, Stellaria media and Triticum aestivum.

The compounds 1.036, 1.039 and 1.065, applied postemergence at a rate of 0.250 kg/ha, combated unwanted plants extremely well and were well tolerated by wheat.

The compound 1.123, applied postemergence at a rate of 0.125 kg/ha, combated unwanted plants very well and was well tolerated by wheat. 

We claim:
 1. A 5-amino-6-pyridazone compound of the formula Ia ##STR11## where R¹ is C₁ -C₄ -alkyl which may carry up to three halogen atoms,A is --CO-- or SO₂ -- B is a C₃ -C₇ -cycloalkyl group; a C₃ -C₇ -cycloalkenyl group; or a 3- to 7-membered saturated or monounsaturated cyclic group with one hetero atom selected from the group consisting of: epoxyethyl, tetrahydrothienyl, tetrahydrothiopyranyl, xanthenyl, dihydrofuranyl, dihydrothienyl and dihydropropanyl, where the cycloalkyl groups or the cycloalkenyl group may be fused with one or two cycloalkyl groups of this type or with one or two benzene nuclei, where the total number of ring members is from 3 to 16 and these cyclic radicals may carry up to three of the following groups: halogen, C₁ -C₄ -alkyl, C₂ -C₆ -alkenyl, C₁ -C₆ -alkynyl and/or phenyl; a mononuclear to trinuclear aromatic or heteroaromatic radicals selected from phenyl; naphthyl; anthracenyl; phenanthrenyl; pyrrolyl; pyrazolyl; imidazolyl; triazolyl; pyridyl; pyrimidyl; pyrazinyl; pyridazinyl; quinolyl; isoquinolyl; furanyl; thienyl; isoxaolyl; oxaolyl; oxathiazolyl; isothiazolyl; thiozalyl; or thiodiozlyl; which radicals may carry up to three of the following groups C₁ -C₄ -alkyl, C₁ -C₄ -haloalkyl, C₁ -C₄ -alkoxy, C₁ -C₄ -haloalkoxy, C₁ -C₄ -alkylthio, C₁ -C₄ -slkylsulfinyl, C₁ -C₄ -alkylsulfonyl, cyano, nitro, carbo-C₁ -C₄ -alkoxy, N,N-di-C₁ -C₄ -alkylcarbamido and/or halogen.
 2. A 5-amino-6-pyridazone compound of the formula Ib ##STR12## where R¹ is C₁ -C₄ -alkyl which may carry up to three halogen atoms,R² is C₁ -C₄ -alkyl or C₃ -C₆ -alkenyl, where these groups may carry up to two phenyl radicals, or C₃ -C₆ -alkynyl, A is --CO-- or --SO₂ --, B is a C₃ -C₇ -cycloalkyl group; a C₃ -C₇ -cycloalkenyl group; or a 3- to 7-membered saturated or monounsaturated cyclic group with one hetero atom selected from the group consisting of: epoxyethyl, tetrahydrothienyl, tetrahydrothiopyranyl, xanthenyl, dihydrofuranyl, dihydrothienyl and dihydropropanyl, where the cycloalkyl groups or the cycloalkenyl group may be fused with one or two cycloalkyl groups of this type or with one or two benzene nuclei, where the total number of ring members is from 3 to 16 and these cyclic radicals may carry up to three of the following groups: halogen, C₁ -C₄ -alkyl, C₂ -C₆ -alkenyl, C₁ -C₆ -alkynyl and/or phenyl; a mononuclear to trinuclear aromatic or heteroaromatic radicals selected from phenyl; naphthyl; anthracenyl; phenanthrenyl; pyrrolyl; pyrazolyl; imidazolyl; triazolyl; pyridyl; pyrimidyl; pyrazinyl; pyridazinyl; quinolyl; isoquinolyl; furanyl; thienyl; isoxaolyl; oxaolyl; oxathiazolyl; isothiazolyl; thiozalyl; or thiodiozlyl; which radicals may carry up to three of the following groups C₁ -C₄ -alkyl, C₁ -C₄ -haloalkyl, C₁ -C₄ -alkoxy, C₁ -C₄ -haloalkoxy, C₁ -C.sub. 4 -alkylthio, C₁ -C₄ -slkylsulfinyl, C₁ -C₄ -alkylsulfonyl, cyano, nitro, carbo-C₁ -C₄ -alkoxy, N,N-di-C₁ -C₄ -alkylcarbamido and/or halogen.
 3. A method for combating the growth of unwanted plants which method comprises contacting the unwanted plants with a herbicidally effective amount of at least one 5-amino-6-pyridazone compound of the formula Ia or Ib ##STR13## where R¹ is C₁ -C₄ -alkyl which may carry up to three halogen atoms,R² is C₁ -C₄ -alkyl or C₃ -C₆ -alkenyl, where these groups may carry up to two phenyl radicals, or C₃ -C₆ -alkynyl, A is --CO-- or --SO₂ --, B is a C₃ -C₇ -cycloalkyl group; a C₃ -C₇ -cycloalkenyl group; or a 3- to 7-membered saturated or monounsaturated cyclic group with one hetero atom selected from the group consisting of: epoxyethyl, tetrahydrothienyl, tetrahydrothiopyranyl, xanthenyl, dihydrofuranyl, dihydrothienyl and dihydropropanyl, where the cycloalkyl groups or the cycloalkenyl group may be fused with one or two cycloalkyl groups of this type or with one or two benzene nuclei, where the total number of ring members is from 3 to 16 and these cyclic radicals may carry up to three of the following groups: halogen, C₁ -C₄ -alkyl, C₂ -C₆ -alkenyl, C₁ -C₆ -alkynyl and/or phenyl; a mononuclear to trinuclear aromatic or heteroaromatic radicals selected from phenyl; naphthyl; anthracenyl; phenanthrenyl; pyrrolyl; pyrazolyl; imidazolyl; triazolyl; pyridyl; pyrimidyl; pyrazinyl; pyridazinyl; quinolyl; isoquinolyl; furanyl; thienyl; isoxaolyl; oxaolyl; oxathiazolyl; isothiazolyl; thiozalyl; or thiodiozlyl; which radicals may carry up to three of the following groups C₁ -C₄ -alkyl, C₁ -C₄ -haloalkyl, C₁ -C₄ -alkoxy, C₁ -C₄ -haloalkoxy, C₁ -C.sub. 4 -alkylthio, C₁ -C₄ -slkylsulfinyl, C₁ -C₄ -alkylsulfonyl, cyano, nitro, carbo-C₁ -C₄ -alkoxy, N,N-di-C₁ -C₄ -alkylcarbamido and/or halogen.
 4. A compound of the formula Ia as defined in claim 1, wherein A is CO, B is phenyl and R¹ is methyl.
 5. A compound of the formula Ia as defined in claim 1, wherein A is SO₂, B is phenyl and R¹ is methyl.
 6. A compound of the formula Ia as defined in claim 1, wherein A is CO, B is 2-chlorophenyl and R¹ is methyl.
 7. A compound of the formula Ia as defined in claim 1, wherein A is CO, B is 4-chloro-3-thienyl and R¹ is CH₃.
 8. A method for combatting the growth of unwanted plants, wherein the unwanted plants are treated with a herbicidally effective amount of the substituted pyridazone compound defined in claim
 4. 9. A method for combatting the growth of unwanted plants, wherein the unwanted plants are treated with a herbicidally effective amount of the substituted pyridazone compound defined in claim
 5. 10. A method for combatting the growth of unwanted plants, wherein the unwanted plants are treated with a herbicidally effective amount of the substituted pyridazone compound defined in claim
 6. 11. A method for combatting the growth of unwanted plants, wherein the unwanted plants are treated with a herbicidally effective amount of the substituted pyridazone compound defined in claim
 7. 